VS2010 IntelliSense says: CComPtr is not a template - c++

Question

I have encountered a problem when I was trying to write a directshow-based livestream player as an ActiveX control.
I first created a MFC ActiveX control project with VS2010 (under VC++ category),
and attached a dialog on the control, then tested it with a simple html page.
So far it works well, but when I tried to add some directshow codes with CComPtr,
the compiler shows the following errors (I've also attached the line numbers and files):
29 IntelliSense: CComPtr is not a template (CIceBaseLivestreamPlayerCore.h, Line 37)
30 IntelliSense: CComPtr is not a template (CIceBaseLivestreamPlayerCore.h, Line 38)
31 IntelliSense: CComPtr is not a template (CIceBaseLivestreamPlayerCore.h, Line 44)
32 IntelliSense: CComPtr is not a template (CIceBaseLivestreamPlayerCore.h, Line 44)
33 IntelliSense: CComPtr is not a template (CIceBaseLivestreamPlayerCore.h, Line 47)
34 IntelliSense: CComPtr is not a template (CIceBaseLivestreamPlayerCore.h, Line 48)
35 IntelliSense: CComPtr is not a template (CIceBaseLivestreamPlayerCore.h, Line 49)
36 IntelliSense: CComPtr is not a template (CIcePlayAndSaveAXCore.h, Line 19)
37 IntelliSense: CComPtr is not a template (CIcePlayAndSaveAXCore.h, Line 20)
38 IntelliSense: CComPtr is not a template (CIcePlayAndSaveAXCore.h, Line 21)
39 IntelliSense: CComPtr is not a template (CIcePlayAndSaveAXCore.h, Line 22)
Error 2 error C4430: missing type specifier - int assumed. Note: C++ does not support default-int (CIceBaseLivestreamPlayerCore.h, Line 37)
Error 5 error C4430: missing type specifier - int assumed. Note: C++ does not support default-int (CIceBaseLivestreamPlayerCore.h, Line 38)
Error 14 error C4430: missing type specifier - int assumed. Note: C++ does not support default-int (CIcePlayAndSaveAXCore.h, Line 19)
Error 17 error C4430: missing type specifier - int assumed. Note: C++ does not support default-int (CIcePlayAndSaveAXCore.h, Line 20)
Error 20 error C4430: missing type specifier - int assumed. Note: C++ does not support default-int (CIcePlayAndSaveAXCore.h, Line 21)
Error 23 error C4430: missing type specifier - int assumed. Note: C++ does not support default-int (CIcePlayAndSaveAXCore.h, Line 22)
Error 25 error C2614: 'CIcePlayAndSaveAXCore' : illegal member initialization: 'm_vInfTee' is not a base or member (CIcePlayAndSaveAXCore.h, Line 9)
Error 27 error C2614: 'CIcePlayAndSaveAXCore' : illegal member initialization: 'm_fileWriter' is not a base or member (CIcePlayAndSaveAXCore.h, Line 9)
Error 28 error C2614: 'CIcePlayAndSaveAXCore' : illegal member initialization: 'm_AVIMux' is not a base or member (CIcePlayAndSaveAXCore.h, Line 9)
Error 26 error C2614: 'CIcePlayAndSaveAXCore' : illegal member initialization: 'm_aInfTee' is not a base or member (CIcePlayAndSaveAXCore.h, Line 9)
Error 12 error C2614: 'CIceBaseLivestreamPlayerCore' : illegal member initialization: 'm_pGraph' is not a base or member (CIceBaseLivestreamPlayerCore.h, Line 18)
Error 11 error C2614: 'CIceBaseLivestreamPlayerCore' : illegal member initialization: 'm_pControl' is not a base or member (CIceBaseLivestreamPlayerCore.h, Line 18)
Error 3 error C2238: unexpected token(s) preceding ';' (CIceBaseLivestreamPlayerCore.h, Line 37)
Error 6 error C2238: unexpected token(s) preceding ';' (CIceBaseLivestreamPlayerCore.h, Line 38)
Error 15 error C2238: unexpected token(s) preceding ';' (CIcePlayAndSaveAXCore.h, Line 19)
Error 18 error C2238: unexpected token(s) preceding ';' (CIcePlayAndSaveAXCore.h, Line 20)
Error 21 error C2238: unexpected token(s) preceding ';' (CIcePlayAndSaveAXCore.h, Line 21)
Error 24 error C2238: unexpected token(s) preceding ';' (CIcePlayAndSaveAXCore.h, Line 22)
Error 1 error C2143: syntax error : missing ';' before '<' (CIceBaseLivestreamPlayerCore.h, Line 37)
Error 4 error C2143: syntax error : missing ';' before '<' (CIceBaseLivestreamPlayerCore.h, Line 38)
Error 13 error C2143: syntax error : missing ';' before '<' (CIcePlayAndSaveAXCore.h, Line 19)
Error 16 error C2143: syntax error : missing ';' before '<' (CIcePlayAndSaveAXCore.h, Line 20)
Error 19 error C2143: syntax error : missing ';' before '<' (CIcePlayAndSaveAXCore.h, Line 21)
Error 22 error C2143: syntax error : missing ';' before '<' (CIcePlayAndSaveAXCore.h, Line 22)
Error 7 error C2061: syntax error : identifier 'CComPtr' (CIceBaseLivestreamPlayerCore.h, Line 44)
Error 8 error C2061: syntax error : identifier 'CComPtr' (CIceBaseLivestreamPlayerCore.h, Line 47)
Error 9 error C2061: syntax error : identifier 'CComPtr' (CIceBaseLivestreamPlayerCore.h, Line 48)
Error 10 error C2061: syntax error : identifier 'CComPtr' (CIceBaseLivestreamPlayerCore.h, Line 49)
And all these errors seem to specify that there is something weird with the CComPtr,
but I cannot figure out what's wrong.
I've added two header files in the bottom of my stdafx.h as following:
#include <streams.h>
#include <atlbase.h>
And I'll list part of my CIceBaseLivestreamPlayerCore.h and CIcePlayAndSaveAXCore.h as below, all the involved lines in the above errors are all included.
CIceBaseLivestreamPlayerCore.h:
#pragma once
#include "stdafx.h"
class CIceBaseLivestreamPlayerCore
{
...
15 CIceBaseLivestreamPlayerCore():
16 ..., m_pGraph(NULL), m_pControl(NULL),
17 ...
18 { ; }
...
37 CComPtr<IGraphBuilder> m_pGraph;
38 CComPtr<IMediaControl> m_pControl;
...
44 HRESULT ConnectFilters(CComPtr<IBaseFilter> pIn, CComPtr<IBaseFilter> pOut, const AM_MEDIA_TYPE& mType);
...
47 HRESULT MatchPin(CComPtr<IPin>, PIN_DIRECTION, BOOL, BOOL*);
48 HRESULT IsPinConnected(CComPtr<IPin>, BOOL*);
49 HRESULT IsPinDirection(CComPtr<IPin>, PIN_DIRECTION, BOOL*);
};
CIcePlayAndSaveAXCore.h:
#pragma once
#include "CIceBaseLivestreamPlayerCore.h"
class CIcePlayAndSaveAXCore : public CIceBaseLivestreamPlayerCore
{
...
7 CIcePlayAndSaveAXCore() :
8 m_AVIMux(NULL), m_fileWriter(NULL), m_aInfTee(NULL), m_vInfTee(NULL)
9 { ; }
...
19 CComPtr<IBaseFilter> m_AVIMux;
20 CComPtr<IBaseFilter> m_fileWriter;
21 CComPtr<IBaseFilter> m_aInfTee;
22 CComPtr<IBaseFilter> m_vInfTee;
};
Additional dependencies of my project is "strmbasd.lib;winmm.lib;uuid.lib;".
That's all.. Hope someone can give me the answer of how to solve it,
or just gives me any advice or suggestion as a direction of what I should do.
Any help is appreciated.
And this is my first time to post an English question (I'm not a native speaker though..),
so please let me know if I've anything lost or done something wrong as asking a question.
Thanks a lot. :)

Answer 1

After many times of trying I finally found the problem and got it solved.
I think I should put the result here, for there might be someone who has the same problem,
and is not knowing how to solve it like I was. I don't know if it's an etiquette offense of stackoverflow to answer my own question, so I will left this answer unaccepted.
As I've said, I've put #define <atlbase.h> into the bottom of my stdafx.h.
But because I'm making a MFC ActiveX control project, the IDE (VS 2010) auto generates a #define statement into my stdafx.h, which is #define _ATL_NO_AUTOMATIC_NAMESPACE.
And when we use #include <atlbase.h> in ordinary times, the compiler will perform using namespace ATL by default, but this #define _ATL_NO_AUTOMATIC_NAMESPACE statement cancels this behavior, which then caused the naming conflict that my compiler had said.
So, in this case, just use ATL::CComPtr for declarations or directly use using ATL::CComPtr statement in which CComPtr appears, and this compilation error will be eliminated.